Why does object in viewport shading render view suddenly disappear
I suppose Gorgious might be correct with his guess. If you have an AMD graphics card you might have a look at this question:
AMD GPU material is entirely gray
Since you have Overlays disabled, there will not even be an outline of selected objects visible etc.
If it's not the graphics card, check if you might have disabled the Object Types Visibility for Mesh by accident (see left side of screenshot). Or maybe you have disabled the Ray Visibility for Camera in the Object Properties (right side of screenshot), but the latter you must have done on each object that's in the scene which I doubt.
If it's none of the above providing a blend file would be better to find out what it might be. Even if there would be no light in the scene, the world background shines a dim light on the objects so there must at least be something visible. Or do all objects have only a Diffuse shader set completely to white maybe?